'Second' Searchterm 'Second' found in 3 terms [ • ] and 26 definitions [• ]Result Pages : • •
(mA s) The product of the x-ray tube operating current and the exposure time in minutes. See Milliampere and X-Ray Tube. •
Secondary radiation is the result of absorption of other radiation in matter. It could be either electromagnetic or particulate in nature.
• Planck is a MKS unit of energy (expended over time to angular momentum, etc.). One Planck unit is equal to 1 joule second (J x s) or about 0.7375 foot pound second (ft x lb x s). Atomic nuclei possess an intrinsic angular momentum referred to as spin, measured in multiples of Planck's constant. The unit is named for the German physicist Max Planck.
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(A or amp) The SI base unit of electric current. Definition: Two parallel conductors, infinitely long and having negligible cross section should be placed 1 meter apart in a perfect vacuum. One ampere is the current that creates between them a force of 0.2 µN (micronewton) per meter of length. One ampere represents a current flow of 1 coulomb of charge per second. One ampere of current results from a potential distribution of 1 volt per ohm of resistance, or from a power production rate of 1 watt per volt of potential. The unit is known informally as the amp, but A is its official symbol and is named for the French physicist André-Marie Ampère. See also System International. Result Pages : |